Convert NSwagStudio to Avalonia for Mac and Linux Support

[adrianvince7]

No description provided.

[marinasundstrom]

I don't think this is of any priority because of the state of the NSwag project.
You are free to do so if you want to. But I would suggest doing it with Avalonia instead, since that probably is a more easy transition.

[adrianvince7]

I'll attempt a conversion to Avalonia and revert.

[RicoSuter]

Was also thinking about this but probably it would be a complete rewrite of the UI and then we would also improve the config file itself etc. and then yes, we should only do based on the long-term goal of NSwag which is probably going to be AspNetCore.OpenApi extensions + code generation.

[adrianvince7]

I think that the tool remains relevant until there is a mini of the config file.

Hope to put in some more hours this week